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Subject: Electronics and Communication Engineering × Author: Saxena, Ankur × End date: 2019 × Start date: 2016 × Type: Thesis × Thesis Type: Ph.D ×
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    ThesisItemOpen Access
    A novel compact wide band notched slot antenna with enhanced bandwidth for wireless applications
    (G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2016-08) Saxena, Ankur; Gangwar, R.P.S.
    In recent years, there has been a substantial amount of research in the ultra wide band technology for innovation in wireless applications. The electronic gadgets enabled with this technology may be enforced in wearable/handy products. Such type of specific applications excites the challenges to researchers and industries to make this technology different from other conventional antennas of limited bandwidth. Compact size and volume are critical constraints for wearable and portable device applications. A reliable performance for the entire bandwidth along with radiation pattern is required for high data rate applications. Therefore, it has become necessary to develop an antenna with compact size, enhanced bandwidth and notched characteristics. In view of the above, an attempt has been made to develop a novel compact wide band notched slot antenna with enhanced bandwidth for wireless applications. In this dissertation, ultra wide band antennas with an objective to reduce antenna size with increased bandwidth are studied. Further, to minimize the interference problem, the implementable band notching techniques are explored. Initially, UWB antenna is developed using FR-4 substrate of thickness 1.6 mm. A modified rectangular patch in a rectangular slot in ground plane is designed to achieve large bandwidth. Two symmetrical semi-circular slots are implemented to enhance the impedance matching from 15 GHz and above frequency range. A T-stub inside an elliptical slot within the patch is created to achieve band-notching characteristics. The proposed design is simulated using HFSS. The design is fabricated and measured. The simulated and measured results in terms of reflection coefficient, radiation pattern and peak gain is compared. The novelty of this research work is the development of compact antenna with overall dimensions of 14x14 mm2 and antenna bandwidth of 161%. The size and bandwidth are compared with previously designed antennas.